Bakır Anot Çamurundan Bakırın Liçinde Düşük Ötektik Noktalı Çözücü Kullanımının Araştırılması

Öz

Bu çalışmada, pirometalurjik yöntemle metalik bakır üretiminin elektrokazanım aşamasında ortaya çıkan anot çamurundan bakır geri kazanımı üzerine çevre ve insan sağlığına duyarlı düşük ötektik noktalı çözücü (DES) kullanımı araştırılmıştır. Taguchi optimizasyon yöntemi kullanılarak liç sıcaklığı, liç süresi ve katı/sıvı oranı deneysel parametrelerin bakır geri kazanımı üzerine etkisi incelenmiştir. Kolin klorür (ChCl) ve ürenin 1:2 molar oranda karıştırılmasıyla hazırlanan DES çözücüsü ile yapılan liç işlemleri sonunda optimum şartlar; 95 oC’liç sıcaklığı, 2 saat liç süresi ve 1/20 katı/sıvı oranı olarak belirlenmiş ve bu şartlarda %98 bakır geri kazanımı elde edilmiştir. Yapılan bu çalışma ile ChCl-üre karışımıyla hazırlanan DES çözücüsünün anot çamurundan bakır geri kazanımı için çevreci bir çözücü adayı olabileceği ortaya konulmuştur.

Anahtar Kelimeler

• Bakır anot çamuru
• Düşük ötektik noktalı çözücü
• Metal geri kazanımı
• Solvometalurji

Investigation of Use of Deep Eutectic Solvent on Copper Leaching from Copper Anode Slime

Öz

In this study, use of environmentally and human health sensitive solvent, called deep eutectic solvent (DES), was investigated for copper recovery from anode slime which was produced during electrorefining stage of the metallic copper production by pyrometallurgical method. The effect of experimental parameters was investigated using the Taguchi optimization method. At the end of the leaching process with DES solvent prepared by mixing ChCl and urea in 1:2 molar ratio, optimum conditions were determined as; 95 oC leaching temperature, 2 hours leaching time and 1/20 solid/liquid ratio and 98% copper recovery was obtained under this condition. With this study, it has been revealed that DES prepared by ChCl-urea mixture can be an environmentally friendly solvent candidate for copper recovery from anode slime.

Anahtar Kelimeler

• Copper anode slime
• Deep eutectic solvent
• Metal recovery
• Solvometallurgy

Kaynakça

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